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Vacuum microwave vibration drying method with low energy consumption and low crack ratio for granular food-borne material

A drying method and granular technology, which is applied in the field of processing and preservation of food-derived materials, can solve the problems of high energy consumption and high drying cost, and achieve the effects of uniform drying, reduced drying energy consumption, and sensitive response

Active Publication Date: 2013-04-17
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has a high drying time and high quality, but the drying cost is high and the energy consumption is high

Method used

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  • Vacuum microwave vibration drying method with low energy consumption and low crack ratio for granular food-borne material
  • Vacuum microwave vibration drying method with low energy consumption and low crack ratio for granular food-borne material
  • Vacuum microwave vibration drying method with low energy consumption and low crack ratio for granular food-borne material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The hot air drying method of rehydrated soybeans and the traditional microwave drying method at different powers (0.50w / g, 0.75w / g, 0.10w / g):

[0055] Weigh 200g of pretreated complete soybeans, place them in a drying room container, and heat them with 0.50w / g, 0.75w / g, and 0.10w / g microwave power for 30min, 20min, and 12min respectively, and turn on the air dehumidification system , the temperature is controlled at 4-10°C, after the drying is completed, cool down, take a sample to measure the moisture, color, temperature and burst rate, and record the number of the meter. (See Table 2)

Embodiment 2

[0057] Microwave vacuum vibration bed drying method for rehydrated soybeans at different powers (0.50w / g, 0.75w / g, 0.10w / g):

[0058] Weigh 200g of pretreated complete soybeans and put them into a polytetrafluoroethylene tank, the tank weight is 2426.5g, and the tank wall thickness is 2.4cm. After placing the container in the drying room, vacuumize to -0.065MPa, and use 100w, 150w, and 200w microwave power respectively. Heating, the vibration frequency of the motor is 450r / min; the set running time is 1.3s, and the intermittent time is 1s as a vibration cycle; the heating time is 30min, 20min, and 12min respectively, and the air dehumidification system is turned on, the temperature is controlled at 4-10°C, and the drying is completed After cooling, take samples to measure moisture, color, temperature and bursting rate, and record the meter numbers.

[0059] Weigh 200g of pretreated whole kidney beans, put them into a polytetrafluoroethylene tank, place them in an oven, set the...

Embodiment 3

[0063] Drying method of rehydrated soybeans in a microwave vacuum vibrating bed at a microwave power of 0.50W / g and different vibration frequencies (350r / min; 450r / min; 550r / min):

[0064] Weigh 200g of pretreated complete soybeans and put them into a polytetrafluoroethylene tank, place them in a drying room container and then evacuate to -0.065MPa, set the microwave power to 0.5W / g; use motor vibration frequencies of 350r / min, 450r / min, Heating at 550r / min; set the running time to 1.3s, and the intermittent time to 1s as a vibration cycle; the heating time is 30min; turn on the air dehumidification system, and control the temperature at 4-10°C. After drying, cool down and take samples for moisture, Determination of color, temperature and bursting rate, and record the meter numbers.

[0065] Table 3. Effects of different motor vibration frequencies on drying materials by microwave vacuum vibrating bed drying method at microwave power of 0.5W / g

[0066]

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Abstract

The invention relates to a vacuum microwave vibration drying method with low energy consumption and low percent cracked rice for a granular food-borne material. The vacuum microwave vibration drying method comprises the steps of: filling grains subjected to a pre-treatment into a vacuum tank; vacuumizing to below -0.065 Mpa, wherein a microwave output power is 0.5 w / g-1.0 w / g, a vibration frequency is 350 r / min-550 r / min, and a vibration amplitude is -2 cm to 2 cm; and reducing moisture content of the material from 20%-25% to less than 13% after 12 min to 30 min. According to the invention, the vacuum microwave vibration drying method is adopted to fully make use of the advantage of a fast microwave drying speed and a vacuum low-temperature drying superiority to reduce a boiling point of water in the material through a negative pressure function for one aspect, thereby shortening a drying time and reducing drying energy consumption, and change the position of the material in a microwave field in real time through a vibration function for the other aspect, thereby improving uniformity of microwave energy absorption, reducing percent cracked rice and improving drying quality. The vacuum microwave vibration drying method, disclosed by the invention, can reduce the energy consumption by 70% when compared with the traditional hot air drying method, and can reduce the percent cracked rice by 60% when compared with a microwave vibration drying method.

Description

technical field [0001] The invention relates to a technology for processing and preserving food-derived materials, and more particularly to a microwave vacuum vibration drying technology for grains. Background technique [0002] As the world's largest grain producer and consumer, my country's annual grain output reaches 5 × 10 8 t, and the consumption of grain from harvest to consumption can reach 18%, of which grain mildew and germination caused by excessive moisture content account for 5%. Therefore, grain drying is a key and weak link in the current agricultural development in my country. Judging from the development situation of drying technology at home and abroad, there are many problems in the practical application of conventional single-mode drying technology, which promotes the development of combined drying technology for energy saving and emission reduction, and has become an innovation in the field of grain drying. Grow up. The combined drying technology utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B9/08
Inventor 赵建新高文华何天琦范大明陈卫张灏王丽云闫博文朱佳琳
Owner JIANGNAN UNIV
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